scripts/runqemu.README: fix typos and trailing whitespaces

(From OE-Core rev: 217b00d378f359689613ca4c0666bb2eed040f69)

Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/runqemu.README

@@ -1,12 +1,12 @@
 Using OE images with QEMU
 =========================
 
-OE-Core can generate qemu bootable kernels and images with can be used 
+OE-Core can generate qemu bootable kernels and images which can be used
 on a desktop system. The scripts currently support booting ARM, MIPS, PowerPC
-and x86 (32 and 64 bit) images. The scripts can be used within the OE build 
-system or externaly.
+and x86 (32 and 64 bit) images. The scripts can be used within the OE build
+system or externally.
 
-The runqemu script is run as: 
+The runqemu script is run as:
 
    runqemu <machine> <zimage> <filesystem>
 
@@ -15,13 +15,13 @@ where:
    <machine> is the machine/architecture to use (qemuarm/qemumips/qemuppc/qemux86/qemux86-64)
    <zimage> is the path to a kernel (e.g. zimage-qemuarm.bin)
    <filesystem> is the path to an ext2 image (e.g. filesystem-qemuarm.ext2) or an nfs directory
-   
-If <machine> isn't specified, the script will try to detect the machine name 
+
+If <machine> isn't specified, the script will try to detect the machine name
 from the name of the <zimage> file.
 
 If <filesystem> isn't specified, nfs booting will be assumed.
 
-When used within the build system, it will default to qemuarm, ext2 and the last kernel and 
+When used within the build system, it will default to qemuarm, ext2 and the last kernel and
 core-image-sato-sdk image built by the build system. If an sdk image isn't present it will look
 for sato and minimal images.
 
@@ -31,7 +31,7 @@ Full usage instructions can be seen by running the command with no options speci
 Notes
 =====
 
- - The scripts run qemu using sudo. Change perms on /dev/net/tun to 
+ - The scripts run qemu using sudo. Change perms on /dev/net/tun to
    run as non root. The runqemu-gen-tapdevs script can also be used by
    root to prepopulate the appropriate network devices.
  - You can access the host computer at 192.168.7.1 within the image.